CN102705548B - Pressure relief valve for oil-immersed transformer and oil-immersed transformer - Google Patents
Pressure relief valve for oil-immersed transformer and oil-immersed transformer Download PDFInfo
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- CN102705548B CN102705548B CN201210130289.XA CN201210130289A CN102705548B CN 102705548 B CN102705548 B CN 102705548B CN 201210130289 A CN201210130289 A CN 201210130289A CN 102705548 B CN102705548 B CN 102705548B
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- valve
- valve body
- pressure relief
- oil
- decompression valves
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Abstract
The invention provides a pressure relief valve for an oil-immersed transformer and an oil-immersed transformer. The pressure relief valve for the oil-immersed transformer comprises a valve body communicated with a transformer and a valve cover arranged on the valve body; the pressure relief valve is characterized in that a ventilation channel is arranged on the valve cover; a pressure relief port is arranged on a side wall of the valve body; the pressure relief port is communicated with an oil storage bottle through a backflow pipe; the oil storage bottle is communicated with the outside air through a ventilation window on an oil storage cover; a valve plug is arranged at a pipe port of the valve body; the upper end of the valve plug is limited by the pipe port of the valve body; the lower end of the valve plug stretches into a cavity of the valve body; a gap is reserved in the inner side wall of the valve body; a sealing ring is arranged at the lower end of the valve plug; an elastic reset mechanism is arranged between the valve plug and the valve cover; when the valve plug is arranged at a first limiting position, the sealing ring is located above the pressure relief port; and when the valve plug is arranged at a second limiting position, the sealing ring is located below the pressure relief port. The pressure relief valve is thorough in pressure relief, high in sensitivity, capable of preventing the waste of cooling oil, and beneficial to the addition of the cooling air.
Description
Technical field
The present invention relates to a kind of Decompression valves, relate in particular to a kind of Decompression valves for oil-immersed power transformer; The invention still further relates to a kind of oil immersed transformer.
Background technique
Existing oil-immersed power transformer generally all comprises housing and the component for variable-pressure that is placed in enclosure interior, and this component for variable-pressure mainly is comprised of iron core and the coil winding be wrapped on iron core, and component for variable-pressure is placed in transformer shell, and with lid, it is sealed.
Generally be wound with a plurality of windings on transformer iron core, transformer is in the process of work, and electric current is by coil, and the generation heat, if, not in time to the coil cooling, can cause the overheated transformer work corrupted that causes of coil.For this reason, present transformer generally selects liquid cooling oil to be cooled, and specific practice is that cold oil is poured in the cavity that transformer shell and lid surround and iron core and winding are immersed in cold oil.Because oily specific heat ratio is larger, can be good at as the winding cooling, but also bring thus a problem, in the transformer working procedure, wire and cooling long term, can produce unavoidably reaction and discharge some gases, and the air pressure of transformer inside is raise, if this air pressure can not be discharged in time, bring serious potential safety hazard can to the normal operation of transformer.
Existing transformer Decompression valves generally is comprised of valve body, valve gap and valve pad, this valve pad is squeezed in the valve port place by valve gap, valve gap is that non-tight is connected with the valve body mouth of pipe, and when the inner generation of transformer pressure, this pressure impacts valve pad and gushes from the gap between valve gap and the valve body mouth of pipe.Although this structure can play certain pressure release effect, often need very large pressure just can back down valve pad, that is to say to only have when the transformer internal pressure reaches very high and just can complete pressure release, and have the incomplete defect of pressure release.Moreover this pressure relief can only be used for pressure release, when pressure is uprushed in transformer, usually cause cold oil in transformer to spray outward, the cold oil of ejection can not be recycled, and causes oily waste.In addition, when cold oil reduces in transformer, need to take valve gap and the valve pad of Decompression valves apart, by valve body, add cold oil, because the valve body mouth of pipe is thinner, operate very inconvenient.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of pressure release thoroughly and can prevents the Decompression valves of cold oil waste.
The present invention also provides a kind of pressure release thoroughly and can prevent the oil immersed transformer of cold oil waste.
In order to solve the problems of the technologies described above, the technological scheme that the present invention takes is:
A kind of Decompression valves for oil immersed transformer, comprise the valve body be communicated with transformer and be located at the valve gap on valve body, it is characterized in that, described valve gap is provided with scavenge duct, described body wall is provided with pressure relief opening, pressure relief opening is communicated with oil storage bottle by reflow pipe, oil storage bottle is communicated with ambient air by the louver(-vre) be located on oil storage cover, described valve body mouth of pipe place also is provided with valve plug, the upper end of valve plug is spacing by the valve body mouth of pipe, lower end stretch in the valve body chamber and and the valve body madial wall between leave gap, the valve plug lower end also is provided with seal ring, be provided with flexible restoring organ between valve plug and valve gap, described valve plug is when the first limit position, seal ring is positioned at the pressure relief opening top, valve plug is when the second limit position, the below of seal ring in pressure relief opening.
Described flexible restoring organ is spring.In another embodiment, described flexible restoring organ is comprised of two shell fragments, and described each shell fragment one end is fixed on valve gap, and the other end slides on the position limit cycle of valve plug.Further, described position limit cycle is provided with two parallel guiding slip grooves, and an end of shell fragment is limited in guiding slip groove.Further, in order to make shell fragment, remain in guiding slip groove, described valve gap is provided with restraining groove, and the limited groove of position limit cycle is spacing, and along the restraining groove displacement.
Oil storage bottle of the present invention is fixed by supporting frame.
Louver(-vre) of the present invention is the tubular structure vertically arranged, and the ventilation window is located on the sidewall of louver(-vre), and this structure can prevent that rainwater from entering in oil storage bottle.
In one embodiment, described oil storage bottle is funnel-like, and the maximum caliber of oil storage bottle is 5cm ~ 20cm.
In another embodiment, described reflow pipe is metal tube.
The present invention also provides a kind of oil immersed transformer, comprises housing and lid, and the cavity that housing and lid surround is built-in with iron core, and this transformer also comprises above-mentioned Decompression valves, and the valve body of described Decompression valves is located on lid and with transformer and is communicated with.
The present invention takes to have following beneficial effect:
The first, the present invention is provided with pressure relief opening and is provided with seal ring in the valve plug lower end on the sidewall of valve body, and very short displacement only need occur valve plug can complete pressure release, and sensitivity is higher, and pressure release is more thorough.
The second, when oil spout occurs, cold oil enters in oil storage bottle by reflow pipe, until pressure, lets out after removing and flows back to transformer, the waste of having avoided oil spout to cause again.
Three, the oil storage cover of only need outwarding winding when adding cold oil in transformer, adds by oil storage bottle, and described oil storage bottle is the choana structure, is more convenient for operating.
Four, the present invention is simple in structure, cheap for manufacturing cost, suitability for industrialized production.
The accompanying drawing explanation
Fig. 1 is the overall structure figure of Decompression valves of the present invention;
Fig. 2 is the structural representation under the Decompression valves sealing state;
Fig. 3 is the structural representation under Decompression valves pressure release state;
Fig. 4 is the plan view of oil storage cover;
Fig. 5 is the structural representation under another embodiment of Decompression valves;
Fig. 6 is the structural representation of Fig. 5 embodiment lower limit circle.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Oil immersed transformer of the present invention comprises the housing (not shown) and is fastened on the lid on housing, the cavity that housing and lid surround is in order to put iron core, be full of the winding of different coil turns on iron core, iron core and winding have formed the core component of transformer jointly.For accelerating the transformer heat radiation, in described transformer cavity, be equiped with liquid cooling oil.
As shown in Figures 1 to 4, in order to let out the pressure produced except transformer, described transformer is provided with Decompression valves, and the Decompression valves in the present embodiment comprises valve body 1 and valve plug 2, and valve body 1 is tubular structure, be located on the transformer lid, and be communicated with transformer by lid, valve body is generally made by metallic material, and the sidewall of valve body 1 is provided with pressure relief opening 22, pressure relief opening 22 is communicated with oil storage bottle 5 by a reflow pipe 6, and oil storage bottle 5 keeps being communicated with ambient air.The mouth of pipe place of valve body 1 is provided with valve gap 3 and valve plug 2, be connected with flexible restoring organ 4 between valve gap 3 and valve plug 2, valve gap 3 is tightened on valve body 1, and valve gap 3 is provided with the scavenge duct (not shown), the pressure that scavenge duct mainly produces when moving up in order to eliminate valve plug 2.
Described valve plug 2 can be made by metallic material or rubber material, its upper end is provided with position limit cycle 23, position limit cycle 23 slightly larger in diameter are in the caliber of valve body 1, the lower end of valve plug 2 stretch in valve body 1 chamber and and the madial wall of valve body 1 between keep certain gap, this gap length does not have particular determination, as long as can make gas and liquid cooling oil pass through.The lower end of valve plug is provided with seal ring 21, and sealing circle 21 roughly is trapezium structure, with valve body 1 inwall close contact, seal ring 21 is made by silica gel or rubber material, there is certain deformation elasticity, make the gas in valve body 1 can only pass through seal ring 21 from top to bottom, and can not pass through from bottom to up.
The axial length of valve plug 2 should meet following condition: valve plug 2 can seal or open pressure relief opening 22 in its displacement stroke, be also, valve plug 2 has two limit positions in displacement stroke, when in the first limit position, the seal ring 21 of valve plug 1 lower end is positioned at the top of pressure relief opening 22, valve body 1 passes through louver(-vre) 9 conductings with the external world, as shown in Figure 3; Valve plug 2 is when the second limit position, and seal ring 21 is positioned at the below of pressure relief opening 22, the gas channel sealing between valve body 1 and louver(-vre) 9, as shown in Figure 2.
Working principle of the present invention is as follows: under original state, the valve plug 2 of described Decompression valves is in the second limit position, and now, valve body 1 seals with extraneous.When the transformer inner member in the course of the work when discharging gas or other reasons and produce pressure, due to, the interior pressure of valve body 1 increases, valve plug 2 moves up along valve body 1 under pressure, when valve plug 2 moves to the first limit position, valve body 1 and extraneous conducting, the interior pressure of valve body 1 is released.Complete when earth pressure release, because the pressure in valve body 1 reduces, valve plug 2 moves down until again get back to the second limit position under the effect of flexible restoring organ 4.
Pressure in transformer is instantaneous while increasing sharply, and the cold oil in transformer is from pressure relief opening 22 ejections, and enters in oil storage bottle 5 along reflow pipe 6, treats that earth pressure release is complete, and the cold oils in oil storage bottle 5 are back in transformer again, have prevented the waste of cold oil.
When the cold oil in transformer reduces, can add by oil storage bottle 5, the oil storage cover 7 of only need outwarding winding, cold oil is added in oil storage bottle 5, cold oil enters the gap between valve plug 2 and valve body 1 by reflow pipe 6, and due to fuel head, apparently higher than pressure relief opening 22, the cold oil at seal ring 21 places applies downward pressure to seal ring 21, make seal ring 21 that miniature deformation occur, cold oil is by the gap inflow transformer between seal ring 21 and valve body 1.
Be only below specific embodiments more of the present invention, but the present invention is not limited thereto, within all unsubstantialities of making on basis of the present invention are changed and all will be fallen into protection scope of the present invention.
Claims (10)
1. the Decompression valves for oil immersed transformer, comprise the valve body (1) be communicated with transformer and be located at the valve gap (3) on valve body (1), it is characterized in that, described valve gap (3) is provided with scavenge duct, described valve body (1) sidewall is provided with pressure relief opening (22), pressure relief opening (22) is communicated with oil storage bottle (5) by reflow pipe (6), oil storage bottle (5) is communicated with ambient air by the louver(-vre) (9) be located on oil storage cover (7), described valve body (1) mouth of pipe place also is provided with valve plug (2), the upper end of valve plug (2) is spacing by valve body (1) mouth of pipe, lower end stretch in valve body (1) chamber and and valve body (1) madial wall between leave gap, valve plug (2) lower end also is provided with seal ring (21), be provided with flexible restoring organ (4) between valve plug (2) and valve gap (3), described valve plug (2) is when the first limit position, seal ring (21) is positioned at pressure relief opening (22) top, valve plug (2) is when the second limit position, the below of seal ring (21) in pressure relief opening (22).
2. Decompression valves according to claim 1, is characterized in that, described flexible restoring organ (4) is spring.
3. Decompression valves according to claim 1, is characterized in that, described flexible restoring organ (4) is comprised of two shell fragments, and it is upper that described each shell fragment one end is fixed in valve gap (3), and the other end slides on the position limit cycle (23) of valve plug (2).
4. Decompression valves according to claim 3, is characterized in that, described position limit cycle (23) is provided with two parallel guiding slip grooves (24), and an end of shell fragment is limited in guiding slip groove (24).
5. Decompression valves according to claim 4, is characterized in that, described valve gap is provided with restraining groove, and the limited groove of position limit cycle (23) is spacing, and along the restraining groove displacement.
6. Decompression valves according to claim 1, is characterized in that, described oil storage bottle (5) is fixing by supporting frame (8).
7. Decompression valves according to claim 6, is characterized in that, described louver(-vre) (9) is the tubular structure vertically arranged, and ventilation window (91) is located on the sidewall of louver(-vre) (9).
8. Decompression valves according to claim 7, is characterized in that, described oil storage bottle (5) is funnel-like, and the maximum caliber of oil storage bottle (5) is 5cm ~ 20cm.
9. Decompression valves according to claim 1, is characterized in that, described reflow pipe (6) is metal tube.
10. an oil immersed transformer, comprise housing and lid, the cavity that housing and lid surround is built-in with iron core, it is characterized in that, described transformer comprises the arbitrary described Decompression valves of claim 1 to 9, and the valve body of described Decompression valves is located on lid and with transformer and is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210130289.XA CN102705548B (en) | 2012-04-28 | 2012-04-28 | Pressure relief valve for oil-immersed transformer and oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210130289.XA CN102705548B (en) | 2012-04-28 | 2012-04-28 | Pressure relief valve for oil-immersed transformer and oil-immersed transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705548A CN102705548A (en) | 2012-10-03 |
| CN102705548B true CN102705548B (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210130289.XA Expired - Fee Related CN102705548B (en) | 2012-04-28 | 2012-04-28 | Pressure relief valve for oil-immersed transformer and oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102705548B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022715B (en) * | 2020-01-14 | 2020-11-17 | 南京罗纳防务装备有限公司 | Full-automatic exhaust unloading valve |
| CN112259337B (en) * | 2020-10-30 | 2021-12-03 | 芜湖金牛电气股份有限公司 | Pressure relief valve for oil-immersed transformer with thorough pressure relief |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88210175U (en) * | 1988-02-13 | 1988-12-07 | 中国人民解放军87456部队 | Protector for oil-quenched transformer |
| CN2503284Y (en) * | 2001-07-28 | 2002-07-31 | 台州市正发通用元件有限公司 | Conical sealing load releasing valve |
| CN2609245Y (en) * | 2003-03-06 | 2004-03-31 | 李晋峰 | Oil immersion type mutual inductor manual charged oil supplying device |
| US7122075B2 (en) * | 2001-07-23 | 2006-10-17 | Josef Altmann | Device for reducing the gas and water contamination of transformer oil filling |
| CN2856644Y (en) * | 2005-10-31 | 2007-01-10 | 洛阳北方易初摩托车有限公司 | Machine oil decompression means of motorcycle engine |
| CN202597814U (en) * | 2012-04-28 | 2012-12-12 | 广东卓立变压器有限公司 | Decompression valve for oil-immersed transformer and oil-immersed transformer |
-
2012
- 2012-04-28 CN CN201210130289.XA patent/CN102705548B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88210175U (en) * | 1988-02-13 | 1988-12-07 | 中国人民解放军87456部队 | Protector for oil-quenched transformer |
| US7122075B2 (en) * | 2001-07-23 | 2006-10-17 | Josef Altmann | Device for reducing the gas and water contamination of transformer oil filling |
| CN2503284Y (en) * | 2001-07-28 | 2002-07-31 | 台州市正发通用元件有限公司 | Conical sealing load releasing valve |
| CN2609245Y (en) * | 2003-03-06 | 2004-03-31 | 李晋峰 | Oil immersion type mutual inductor manual charged oil supplying device |
| CN2856644Y (en) * | 2005-10-31 | 2007-01-10 | 洛阳北方易初摩托车有限公司 | Machine oil decompression means of motorcycle engine |
| CN202597814U (en) * | 2012-04-28 | 2012-12-12 | 广东卓立变压器有限公司 | Decompression valve for oil-immersed transformer and oil-immersed transformer |
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| Publication number | Publication date |
|---|---|
| CN102705548A (en) | 2012-10-03 |
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Granted publication date: 20140101 Termination date: 20180428 |